25255530 has 64 divisors (see below), whose sum is σ = 68169600. Its totient is φ = 6652800.

The previous prime is 25255519. The next prime is 25255547. The reversal of 25255530 is 3555252.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 25255494 and 25255503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23505 + ... + 24555.

It is an arithmetic number, because the mean of its divisors is an integer number (1065150).

Almost surely, 2^25255530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25255530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34084800).

25255530 is an abundant number, since it is smaller than the sum of its proper divisors (42914070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25255530 is a wasteful number, since it uses less digits than its factorization.

25255530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 25255530 is about 5025.4880360021. The cubic root of 25255530 is about 293.3946310717.

The spelling of 25255530 in words is "twenty-five million, two hundred fifty-five thousand, five hundred thirty".